package jiali.input;

import java.io.FileInputStream;
import java.io.IOException;

public class InputStreamDemo {
    public static void main(String[] args) {
        try(FileInputStream fileInputStream = new FileInputStream("input.txt")) {
            int available = fileInputStream.available();
            System.out.println();
        }catch (IOException e) {
            e.printStackTrace();
        }

    }
}
